Using these 3D starry sky blackout curtains is a breeze. Just install them in your desired window area, and they'll instantly transform your room. When it's time to clean them, you can either use a washing machine or wash them by hand. If you choose to hand - wash, make sure the water temperature is below 90℉ to protect your hands. Remember, each set comes with two panels, so if you need a certain size, keep in mind the measurements of each panel. Also, be careful when taking them off for washing to avoid hurting yourself. Due to monitor differences, the actual color might vary a bit from what you see on the screen. With proper care, these curtains will serve you well for a long time, keeping your room dark, dust - free, and beautifully decorated.